Quote:
Originally Posted by DannoXYZ
When was ABS brakes 1st used?
When was DOT-5.1 fluid developed?
What makes DOT-5.1 different than DOT-3/4?
What makes DOT-5 different than DOT-3/4/5.1?
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ABS it self was invented 1971 by Fiat and first used in 1978 in Mercedes-Benz even my 1988 Chevy C2500 2WD has ABS but it for rear brakes.
I think DOT-5.1 Fluid was first used around 2014/5 in ABS system like heavy duty 3/4, 1 ton Trucks, Motorhome, etc that tow a lot of weight.
Think of 5.1 as a modified blend version of glycol based of DOT-4 fluid but meets all DOT-5 silicone-based fluid standards which is still compatible with DOT-3/4 but with Dry Boiling Point 260C / 500F and Wet Boiling Point 180C / 356F just like DOT-5.
The reason why you can't use DOT-5 in ABS system as will it start causing foaming in fluid with silicone fluid because of the way ABS system work so new improved Glycol ether / borate ester DOT-5.1 was born.
I don't know if today Motorcycle with ABS is using DOT 5.1 Been I haven't work on one with the system